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Title: Stimulation of gross dimethylsulfide (DMS) production by solar radiation
Authors: Galí, Martí
Saló, Violeta
Almeda García, Rodrigo 
Calbet, Albert
Simó, Rafel
UNESCO Clasification: 251001 Oceanografía biológica
Keywords: Dimethyldisulfide
Gross DMS production
Microbial community
Solar radiation
Issue Date: 2011
Project: MICROROL - Role of microzooplankton in marine food webs dynamics: functional diversity, relevance in C, N and P cycles and trophic impact on primary producers (CTM2004-02575/MAR)
SUMMER (CTM2008‐ 03309)
Expedición de Circunnavegación Malaspina 2010: Cambio Global y Exploración Del Océano Global 
Journal: Geophysical Research Letters 
Abstract: Oceanic gross DMS production (GP) exerts a fundamental control on the concentration and the sea‐air flux of this climatically‐active trace gas. However, it is a poorly constrained process, owing to the complexity of the microbial food web processes involved and their interplay with physical forcing, particularly with solar radiation. The “inhibitor method”, using dimethyldisulfide (DMDS) or other compounds to inhibit bacterial DMS consumption, has been frequently used to determine GP in dark incubations. In the work presented here, DMDS addition was optimized for its use in light incubations. By comparing simultaneous dark and light measurements of GP in meso‐ to ultraoligotrophic waters, we found a significant enhancement of GP in natural sunlight in 7 out of 10 experiments. Such stimulation, which was generally between 30 and 80% on a daily basis, occurred throughout contrasting microbial communities and oceanographic settings.
ISSN: 0094-8276
DOI: 10.1029/2011GL048051
Source: Geophysical Research Letters [ISSN 0094-8276], v.38, n. 15
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